Carbureter.



G. P. RETTIG.

CARBURETER.

APPLICATION FILED SEPT.7,'1910. 1,040,414. Patented 0011211912.

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CARBURETER.

APPLICATION TILED SEPT. 7, 1910.

1,040,414, Patented Oct. 8, 1912.

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ATEN'I OFFICE.

GEORGE P. RETTIG, OF RICHMOND, INDIANA.

CARBURETER.

Specification of Letters Patent.

Patented Get. 8, 1912.

Application tiled September 7, 1910. Serial No. 580,921.

To. all 'whom it may concer/t Be it known that I, Geenen I). ltn'r'rio, a citizen ot the United States, residing in the city otl Richmond, in the county ot VWayne and State of Indiana, have invented certain new and useful Improvements in Carbureters, of which the following a full, clear, and accurate description and specification, being such as will enable others to make and use the same with absolute exactitude and with certainty and precision.

My present invention relates, more particularly, to a carbiircter :tor internal combustion engines or the like, the carburetor being adapted for trans forming a liquid fuel into a gaseous t'uel tor explosion within the engine cylinder.

The object of this invention, broadly speaking, is to provide a carburetor which will be strong and durable in construction, positive `in action, adapted to a wide scope of usefulness and ctl'iciency, and which can be manufactured and sold at a comparan tively low price.

A more particular' object. is to provide un automatic multi-range carlnlreter in which the admission of fuel is autouiatically corr trolled to depend on the requirements of the engine, whereby the fuel is kept uniform, iu relation to the air, for every level ot' the Ltuel and for every speed or condition otl 'the engine.

Another object of my invention is to provide a progressive vaporizer having a plu rality of transformers or vaporizers arranged to operate under dil'l'erent degrees ot pressure or suction, thereby providing a wide range of operation, tlrom :the commeucement of operation ot the first vaporizcr to the limit et capacity olf the last vaporizer.

Other minor objects and particular advantages of my invention will be brought out in the course 'of the following` specification, and that which is new will be correlated in .the appended claim.

One manner -tor carrying out the objects of my invention, and that which in practice has been found to be the most desirable, shown in the accompanying,lr drawings, in which- Figure 1 is a vertical central section taken through my construction. Fig. Q is a plan view of certain of the parts, certain other parts being shown in section. Fig. 3 is a front elevation, partly in vertical Section. Fig. 4 is a horizontal section.

Similar indices denote like parts throughout the several viewsV o'f the two sheets of drawings.

In order that the construction and the operation oLt my invention may be more fully understood and that its advantages may be properly appreciated I will now take up a detailed description thcrel'rtI in which I will describe the invention as briefly and as comprehensively as I may.

The body oli' my invention comprises the float-chamber A, same having a removable top l, by which access may be had thereinto as indicated.

Formed integral with the wall of chamber A and extending out from one side, near the bottom thereof, is the three-'fold bracket 2 which supports the three mixing chambers hereinafter re'tcrred to in detail.

Formed through the wall ot' chamber A, near the top thereof, and opposite to the center of said bracket Q, is a threaded aperture in which is attached the outwardly and then downwardly extending valvechiunber B, the interior thereof beine,r in communicution with the interior of the tloat chamber, substantially as indicated.

Threaded onto the lower end of the valvechaniber is the angulanlitting 3 in which is threaded the vertically operable stem 5, same having a eup-ll e cavity in its upper end, which latter is located inside of the chamber B. Said stem 5 is operable by the knob 6. Numeral Ll .denotes a nipple through which the liquid fuel may pass from the fuel supply. The fuel passing through said nipplr Llpasses thence through the passage I'I and their through apertures I and J into the interior ot stem 5 and then up into the interior oit chamber B.

Numeral 7 denotes a needle stem having an enlarged upper portion which is slidable up and down through an aperture formed in the top oit chamber B. The lower end. of stem 7 is 'formed conical and it is adapted to fit in the cup-like end of 'the stem 5 to close the aperture therethrough. The outer end ot lever 13 is located in a slot formed in the stem 7 whereby as the float 9 is moved up and down the stem 7 will bc moved down and up respectively. t

Numeral 9 denotes a tioat located inside ol the float-chamber, a stern l() being secured to and extending through the center of the float as shown. The lower end ot said .stem 10 extends down into the nipple 1l which acts as a guide for the float. The lower end of said nipple 11 is adapted to be closed by a cap 12. To the upper end of stem 1() is pivoted the lever 13. The central portion of said lever 13 is pivoted at 14, all substantially as indicated in Fig. 1.

In this invention I provide three mixingchambers which are denominated by letters C, D and E, Same being integrally connected with each other, corresponding in cross-section with the top of bracket 2 on which t-hey rest. Said three chambers extend upward and rearward where all unite in the single supply-chamber F common to all of the. three chambers. Said chamber F is cylindrical inform and extending therearound at its upper edge is a flange 15 having ears with bolt apertures f and f formed therethrough whereby the carbureter may be secured in position/with the opening in the top of the supply-chamber. F in connection with the fuel intake of an engine.

The three chambers C, D and E, and the chamber F, are formed integral with each other and they are secured in position, as shown, in connection with the first mentioned portion of the earbureter by means ofthe two bolts 16 and 17 which pass through suitable ears therefor which extend out from the sides of chamber A and from chamber F, all substantially as indicated.

Mounted across in the upper portion, or throat, of' Achamber F is the throttle 18 which is adapted to close the outlet of the mixing chamber.' Said throttle is mounted on shaft 19 which extends through outside the chamber with means in connection therewith whereby the, throttle may be operated 'as desired, either manually or 'automatically and mechanically.

Formed around the supply-chamber is a `fluid or air chamber G through which warm water or air may circulate for heating the carbureter and the vaporized gas as it passes therethrough, it being evident that chamber F will be abnormally cold when the engine is in operation-by reason of the vaporization of the fuel.' ntiance to or from said chamber G may be had through the pgorts Q -g', which may be Vconnected to other sources of supply or delivery.

l now come to a description of the most im ortant feature or my present invention, which relates to the three mixing-chambers, which as they are alike in construction, except in one particular, a description of one will answer for all.

Numeral 2O denotes the controller which is slidable up and down in a portion of the mixing-chamber D, and controllers 20 and 2O\L are likewise mounted in chambers C and D, respectively. Said controllers are cylindrical in form, having an openlower.l end and a closed top or upper end, which when'the controllers are down to their limit will be even with the ledge d. Formed around the lower edge of the controller isa hollow flange e, there being a channel formeds around in the chamber D (and also in chambers C and 791)* in which said flange may operate as the controller moves up and down. Formed through the wall of the controllers are a plurality ot square apertures 71: which are located near to the top of the controller, substantially as shown. Located below each of said controllers is a nozzle mechanism which l will now describe: Numeral 23 denotes a collar having a flaring upper end, the lower end of said' collar is lprovided with a threaded stem 24 which is adapted to be screwed into the center of the bottom of chamber D, the central channel through said collar being in communication with the channel Q which opens into the fibat chamber. Numeral 22 denotes the head, same having` a hollow stem 21 which is threaded into the center of the upper en d ot collar 23. The space between the upper edge of collar 23 and the under 'face of the head 22 is very slight, being such as to allow liquid fuel t-o escape in a thin sheet or spray. Said space between the collar 23 and thevhead 22 may be varied, being adjustable as' desired by simply turning the head causing it to raise and lower. An air inlet fr' opens from the bottom into the lower interior/ of chamber D and allowing the air to pass around collar 23.

Asabove intimated the mechanism just described relates toA chamber D but it is evidenty that the same construction is located 'in chamber C where like parts are denoted,

where shown, by like characters with the addition of a single exponent; while in chamber E like parts are denoted by like characters with double exponents.

The only difference, above intimated, is that the three controllers are made of different weight. In this instance controller 20 is the lighter of the three for the reason that no auxiliary weight is applied to this controlar. Controller 20 is heavier than the former this being accomplished by adding weight in the Hange e. And controller 20 is made heavier than controller 20 by theladdition of moreweight to the liange, thereof.

Operation: The operation of my invention is quite simple and is substantially as follow t lt should irstbe understood that chambe F is to be connected to the intake of an internal combustion engine; nipple 4l is to be connected to a gasolene supply; and inlet 1' is .to be connected with an air supply. Suppose for instance that the engine to which my earbureter is attached be started, and the throttle 1 8' be opened, or nearly so, it is evident that as the piston is on its intake stroke the pulsations which will be set up within the chamber F will each create a suction or -partial vacuum insaid chamber which will,

`20 is .the lighter of the three it will of course be the first to be lifted, in fact the other two controllers Will not be lifted until the `pulsations have reached a predetermined degree. As controller 20 rises: it will manifestly-raise apertures (beve the ledge (l, and the higher said controller is raised, the Wider said apertures will be opened until they are open to their limit, at which time the flange e Will strike the top of channel t thereby preventing the controller from raising higher than is required. Asthe apertures are opened it is evident that the suction of the engine will draw in air t rough inlet fr', also as the controller is lifter away from the nozzle, or head 22, the -gasolene Will be drawn from chamber A through channel g, up through the collar 23, and will pass out from the nozzle in a tine sheet of spray, mixing with the incoming air (in the lower part of chamber D, and the gasi fied air, or ivaplor, will be drawn up through the controller and the apertures 7u and thence into chamber F, from whence it will pass on into the engine to be utilized. New When controller 20 has reached its limit of delivery or nearly so, it is evident 4that if the suction increases that in like manner controller 2O will be raised, causing a like delivery of fuel therethrough, and thereby doubling, or nearly so, the delivery of carbureted fuel, and in like manner when both controllers 20 and QOVhave reached their limit of delivery, or nearly so, then controller 20"'will be lifted and will operate in like manner as above set forth, thereby trebling, or nearly so, the delivery of carbureted fuel to the engine.

By reason of the above described arrange-` ment it is evident that one, v`two, or three controllers are brought into action at one time, depending on the rtwpiirements of the engine, thereby resulting in a saving of fuel and also resulting in a better proportioned and better grade of vaporized fuel, as no one of the controllers or nozzles will be called upon to operate beyond its capacity to properly proportion and mix the gas and air into fuel vapor.

The proper level of gasolene in chamber A is maintained by the float which operates on the admission valve 7, and theheight to which the gasolenc may attain in chamber A may be governed by the position of stem 5, which may be controlled by the knob t3.

I desire that it be fully understoml that various changes may be made in the several details of construction herein shown and de scribed Without departing from the spirit of my invention or sacrificing any of the advantages thereof.

Having now fully shown and described my invention what I claim and desire to secure by Letters Patent of the United States, is-

A carbureter comprising a casing haiing a liquid fuel reservoir, said casing having an extension forming a earbureted fuel sup ply chamber and being of are formation lov cated concentric to the reservoir and adapted to be connected to the intake of an engine, said arc-shaped chamber being divided into a plurality of circular earbureiing chambers each having independent air inlets and connections with the fuel reservoir and supply chamber, an independently operable oil no zlc in each circular chamber, a controller in each of said chambers, each controller comprising an inverted cylinder with openings 1n its side walls adjacent the upper end and adapted to have vertical reciprocation, each cylinder having an enlarged lower end and means whereby each of said cylinders will be progressively operated by the suction of the engine, each being adapted to operate at a ditl'erent degree of suction.

In testimony whereof I have hereunto subscribed my name to this specification in the presence of two subscribing witnesses.

l GEORGE l. RETTIG.

Witnesses ELizAnlrrH M. GRACE, JERRY SMITH. 

